AT-2 R-SPEC navojni rezkar za izdelavo navoja v polno za aluminij

High-efficiency thread mill with end-cutting edge for non-ferrous metals

AT-2 R-SPEC

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KEY FEATURES: AT-2 R-SPEC Super high-efficiency threading "ThreadRacer"

1 Left-hand cut configuration

Climb milling *Counterclockwise spindle rotation

2 With end-cutting edge

Helical drilling + threading can be done simultaneously

3 Oil hole

Superior chip evacuation (Tool DC = Ø4,6 or more) DLC-IGUSS coating Welding prevention & long tool life

4 Special cutting edge

shape Bending of the tool can be controlled

5 2 Flutes

Wide chip room

6 Roughing teeth (2 ridges)

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Higher efficiency by load distribution

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AT-2 R-SPEC: THREADRACER Threading time can be dramatically reduced!

Conventional method (2 processes)

Pre-drilling

AT-2 R-SPEC

Threading

Achieves drilling and threading by continuous helical cutting with a single tool

Rough position settings and inclined nature of cast holes can cause position shifting in following processes...

Comparison of hole position accuracy with drill tap (DRT) 0

DRT

1st hole

DRT

72nd hole

AT-2 R-SPEC

1st hole

AT-2 R-SPEC

100th hole

0,05

0,1

M8×1,25 Depth 18mm AC material Cutting test by shifting the axial center of Ø4,3 pilot hole by 0,7 mm Drill tap: Vc=100m/min,f=1.25mm/rev AT-2 R-SPEC: Vc=220m/min,f=1.2mm/rev

0,15 （mm）

Threading | Thread milling

Useful for preventing shifting of cutting position in cast hole!

s iati o n i ! v e d f o t ed A m o u n a n t l y co n t r o l l c i f si gni

Threading time comparison with conventional method (includes non-cutting time) 0

Conventional method (2 processes) AT-2 R-SPEC

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2

3

4

4,3 seconds 3,2 seconds

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(sec.)

M6×1 Threading length 10mm ADC12 material Conventional drill: Vc=126m/min,f=0.6mm/rev Tap: Vc=94m/min (ATC: 1 time) AT-2 R-SPEC: Vc=220m/min,f=1.2mm/rev

e is ing tim Thread y more b reduced ! % than 25

Possible to thread with air-blow!

Q. Cutting oil sometimes cannot be used for machining aircraft and electrical parts... coolant is generally recommended. However, air-blow can also be A. Water-soluble used when a pre-drilled hole is made to enhance chip separation and restrain welding of the DLC coating.

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AT-2 R-SPEC 2D Type DCON

Threading | Thread milling | Metric

Type 1

DC

without Coolant Hole

LU

DCON

LF

with Coolant Hole

First choice in quality and performance

Type 2 DC

Thread milling without pre-drilled hole

LU LF

DLC-IGUSS coating Left-hand (spindle rotation left) Direction of tool feed: right (clockwise) 2 flutes for large chip room. Coolant-through from M6.

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AC,ADC

Threading | Thread milling

Al

◉

M EDP

Minimum Cutting Bore Ø M3 M4 M5 M6 M8 M10 M12

CARBIDE

LH

h6

TP

DC

LF

0,5 0,7 0,8 1 1,25 1,5 1,75

2,4 3,1 4 4,6 6,2 7,5 9

50 50 50 50 70 80 80

Maximum threading length 6 8 10 12 16 20 24

LU

DCON

ZEFP

Type

7,75 10,45 12,8 15,5 20,38 25,25 30,13

6 6 6 6 8 10 10

2 2 2 2 2 2 2

1 1 1 2 2 2 2

LU

DCON

ZEFP

Type

9,25 12,45 15,3 18,5 24,38 30,25 36,13

6 6 6 6 8 10 10

2 2 2 2 2 2 2

1 1 1 2 2 2 2

Metric

8331220 8331221 8331222 8331223 8331224 8331225 8331226

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Price

AT-2 R-SPEC 2,5D Type

Threading | Thread milling | Metric

EDP 8331227 8331228 8331229 8331230 8331231 8331232 8331233

4

Minimum Cutting Bore Ø M3 M4 M5 M6 M8 M10 M12

TP

DC

LF

0,5 0,7 0,8 1 1,25 1,5 1,75

2,4 3,1 4 4,6 6,2 7,5 9

50 50 50 50 70 80 80

Maximum threading length 7,5 10 12,5 15 20 25 30

Price

CUTTING CONDITIONS Threading | Thread milling | Cutting conditions

AT-2 R-SPEC Aluminum Alloy Casting AC4C - ADC Water Soluble

Wrought Aluminum Alloy Magnesium Alloy A5052 - A7075 - AZ91 - AZ80A Water Soluble

Copper Alloy C1100 Water Soluble

100~300m/min

100~300m/min

100~300m/min

Vc

2 X D Type

Type

2,5 X D Type

2 X D Type

2,5 X D Type

2 X D Type

2,5 X D Type

Thread Size

DC

(min -1)

(mm/min.)

(mm/t)

(min -1)

(mm/min.)

(mm/t)

(min -1)

(mm/min.)

(mm/t)

(min -1)

(mm/min.)

(mm/t)

(min -1)

(mm/min.)

(mm/t)

(min -1)

(mm/min.)

(mm/t)

M 3 X 0,5 M 4 X 0,7 M 5 X 0,8 M 6X1 M 8 X 1,25 M 10 X 1,5 M 12 X 1,75

2,4 3,1 4 4,6 6,2 7,5 9

13.263 14.375 15.915 15.224 12.322 10.186 8.488

1.592 1.941 1.910 2.842 2.218 2.037 1.698

0,3 0,3 0,3 0,4 0,4 0,4 0,4

13.263 14.375 12.732 11.072 8.214 6.791 5.659

1.592 1.941 1.528 2.067 1.479 1.358 1.132

0,3 0,3 0,3 0,4 0,4 0,4 0,4

13.263 14.375 15.915 15.224 12.322 10.186 8.488

159 194 255 284 277 255 212

0,03 0,03 0,04 0,04 0,05 0,05 0,05

13.263 14.375 12.732 11.072 8.214 6.791 5.659

159 194 204 207 185 170 141

0,03 0,03 0,04 0,04 0,05 0,05 0,05

13.263 14.375 15.915 15.224 12.322 10.186 8.488

159 194 255 284 277 255 212

0,03 0,03 0,04 0,04 0,05 0,05 0,05

13.263 14.375 12.732 11.072 8.214 6.791 5.659

159 194 204 207 185 170 141

0,03 0,03 0,04 0,04 0,05 0,05 0,05

S

F

fz

S

F

fz

S

F

fz

S

F

fz

S

F

fz

S

F

fz

Note Bottom shape of finished hole is as depicted in the right picture.

Please make sure that it is acceptable based on the cutting instruction in advance.

Threading | Thread milling

1. AT-2 R-SPEC is only for milling internal threads.

2. This cutting condition table shows standard values. When machining, it is recommended to use the program created by the NC code generator software ThreadPro. 3. Please select "Single-feed" for the path type in ThreadPro. Please adjust the cutting conditions depending on the rigidity of machine, tool holders, and workpiece clamping.

4. Tool vibrations should be kept at a minimum level for maximum accuracy.

5. When machining magnesium alloy materials, please use the coolant oil recommended by the coolant oil manufacturer. Please also properly dispose the cutting chips to prevent fire hazards.

6. Spindle rotation must be counterclockwise due to the left-hand cut configuration.

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OSG ITALIA Via Ferrero, 65 A/B I - 10098 Rivoli - Italy Tel: +39 0117705211 Fax: +39 0117705215 info@osg-italia.it Vischer & Bolli AG Machining and Workholding Im Schossacher 17 CH-8600 Dübendorf T +41 44 802 15 15 F +41 44 802 15 95 info@vb-tools.com

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06/2021 - All rights reserved. © OSG Europe 2021.

Tool specifications subject to change without notice.

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